Socket for incandescent electric lamps.



J. K. LUX.

SOCKET FOR INGANDESCENT ELECTRIC LAMPS. I

APPLIOATION I'ILED'MAR. 25, 1909.

1,007,364. Patented 0ct.31, 1911.

12 2 M a 7g Z 19 6' i b I 5 1 Z 4 I an 'To all whom it-mayconccm:

J LI s K. LUX, 0E JERsEY CITY, NEW JERSEY, ASSIGNOR TO PASS & SEYMQllBaINCa sraras ar or ro o soLvAY NEW voEK.

- sooKE'r ronINcAN'nEsc Nr ELECTRIC naivrrs;

Specification ofLetters'Patent.

; Patented Oct. 31,1911.

Application 'filea' March 2 5, 1909; Serial No.- 485,662,

Be it known thatl, JULIUs K. citi-' zen of the United States,'residing at Jersey City, in the coimt-y'of Hudson and State of New Jersey have invented new arid useful Improvements in- Sockets for Incandescent specification.

.. :My invention. relates to key sockets for incandescent electric lamps, and. consists in c a new constructionofthe sheet brass cap and shell, v vhiclrsuiiip'ort and inclose the. base of insulation'carrying the metallicparts in circuit.

Myinvention consists informing the cap flange and the shell edge witha plurality of engaging parts arranged at equal distances around the circumference to permit the cap first to be installed, as on a. fixture, and the shellthen to be secured thereto in any-one of three'or more relative positions, circumferentially considered,-by a straight push; to insure the correct registering or alinement of the corresponding engaging parts in any one of the positions, Iprovide the cap margin with a suitable guideadapt'ed to fit the key-slotin the shell margin and I form corresponding, but preferably smaller,

.slots in the margin, so that there may be one guide slot to receive the guide in any position of the parts. There may be as many guides on the cap as there are slots on the,

' shell, but onlyone guideis necessary.

The cap is commonly first screwed on the fixture and the shell inclosing the body offixture to bring the key into the proper p'osi-- tion for operation. Vith my invention this trouble is avoided for the shell can be set on the cap in various positions-to bring the piece to the desired point. 1

My invention is shown in the drawing herewith in which the reference numeralsof the description indicate the corresponding parts in all the figures. I

Figure 1 is the elevation of a socket embodying invention. aive rtical "sectlon of the cap and shell at'right anglesto Q Fig. 1,- showing "the interior 5 parts ele- "vation. Fig. 3j-is .a 'top plan ofthe shell.-.

Fig. 4 .is a bottom plan ofthe cap. Fig.- 5 6 0 'is a horizontal section through'the cap. and

flange in, assembled position and "Fig. 6'is a partial elevation of the cap .and's'hell s eparated.

. In the figures, 1 indicates the cap having '65 1 the usual flange .2 and threaded bushing 3' whereby the cap issecured on the fixture or elsewhere. i

-4-is the substantially cylindrical shellhay ing an upper margin adaptedto be inserted "7o within the cap flange, whereby the interior" part s 5 of the socket, are supporteda nd'pro tected after they .have been wired. I To connect the cap to the shell when the parts are assembled the cap flange is provided with a pluralityof small inward projections or lugs 6 which may be desirably formed as here shown by stamping in at regular distances around the'flange' the small lugs. The shell is providedwith an .equal so number of corresponding slots 7 to engage with these .lugs or lips when the shell is inserted straight into the-cap. The naturalrcsiliency of the shell permits this margln to slip by the lips'or lugsand this is promoted by the marglnal guide grooves 8 1n l alinement with the slots, designed to rece ve the lugs and guide them into the slots. r

As my invention relates particularly to key sockets, it will be understood that the socket is providedwit-h a thumb-p1ece10 for its key which extends outwardly through a a slot 12 in the shell margin.

[Adjacent to one of the lugs on the cap flange is provideda guide 13 which may 951 be. formed as here shownr by means of two inwardly prbjecting small lugs adaptedto fit the slot and insure the initial arrangement of the parts in order that the shell may be brought into proper position to be l ou.

inserted into the cap. J-TO' permit the arrangement of the shell and operating parts in varying relations on the cap so: as tobring the thumb-piecein a convenient position as before described, I-have-provided the ;shell ..l,05

with tv- *o,other marginal grooves 15 to engage with the guides, these additional;

grooves .are preferably shorter so as to be covered'by the cap flange when the parts are assembled. By this meansthe arrange- 1.10

part and grooves on the other.

.17 indicates the fiber lining to the'cap and 18 the fiber lining to the upper or larger part of the shell. To retain the latter lining in position there is provided a small lip 20 in the bottom of the thumb-piece slot. The lining 17 within the cap similarly may be retained by means of small interior projections 21 engaging its bottom edge.

Separation of the shell from the cap is easily and quickly accomplished by the compression of the marginal portion of the shell adjacent to the key slot, by the thumb or finger, where the shell is most resilient. This action'causes the initial disengagement of the cap-lug from the transverse-slot adjacent to the key-slot permitting a slight rocking of the shell to cause the disengagement of the remaining lugs when the shell may be easily withdrawn. As shown theupper portion of the insulating base is reduced in diameter to permit the compression of the shell margin for this purpose. To secure the parts the shell is pushed straight home in the cap; as here shown the cap may assume three diiferent positions, this being permitted by the arrangement of the three sets of securing lugs and slots at equal distances and the provision of additional marginal grooves 15 to that formed by the keyslot for the reception of the guide lugs and guidance for the correct engagement of the parts. Three positions are sutlicient though more may be provided for.

Having thus described my invention, what I claim is, I

1. In a socket for incandescent electric lamps, the combination with an inclosing cap and shell having a plurality of engaging parts whereby the cap and shell may be assembled and secured in as many positions when the shell is pushed straight home into the cap, said cap being formed with a single guide element and said shell having a plu 'ality of slots to receive said cap-guide in the respective assembled positions.

2. In a key socket for incandescent electric lamps, the combination with a substantially cylindrical base of insulating material, of.

the terminal and connections secured on said base, a thin metal cap, a tubular metal shell having a resilient upper margin fitting Within the cap, said shell having a key slot and additional similar slots in its upper mar ginal portion, the slots being arranged at equal distances around the circumference of the shell, the shell having short transverse slots adjacent to each of the guide. slots and said cap having inturned guide lugs to engage guide slots when assembled in the respective positions and inturned lips adapted then to engage the transverse slots to secure the cap and shell together.

In a key socket for incandescent electric lamps, the combination with a substantially cylindrical base of insulating materialiot' the terminals and connections secured on said base, a thin metal cap provided with a flange, a thin metal shell having a resilient upper margin fitting within the cap flange, said shell having a longitudinal key slot in its upper marginal portion, a plurality of short, substantially transverse slots adjacent to the margin and arranged equi-distant from each other whereby the parts may be assembled in as many positions as there are slots, and guide grooves on the margin in vertical alinement with the said transverse slots, said grooves being formed by forcing in the metal at the margin, and being of greatest depth at the margin edge and diminishing in depth toward the transverse slots, said cap having inwardly projecting lugs on the flange positioned around the circumference to engage the grooves and-slots, and inwardly turned guide-lugs adapted to fit the he slot to guide the insertion of the shell wit 1lI1 the cap, in one position, said shell-being provided with additional guide slots, to receive the said guide-lugs in the respective positions.

4. In a key socket for incandescent electric lampsrthe combination with a substantially cylindrical base of insulating material, of the terminals and connections secured on said base a thin metal cap provided with a lower flanged portion. a thin metal tubular shell having a resilient upper margin fitting within the cap things, said cap and shell being adapted to form an inclosing case for the base terminals, etc, said shell having a longitudinal key-slot in its upper marginal portion a plurality of short substantially transverse slots adjacent to the margin and arranged equidistant from each other whereby the parts may be assembled in as many positions as there are slots. and guide grooves on the margin in vertical alinement with the said transverse slots, said grooves being formed by forcing in the metal at the margin, and being of greatest depth at the margin edge and diminishing in depth toward the transverse slots, said cap having inwardly projecting lugs on the i flange positioned around the circumference to engage the grooves and slots and inwardly turned glide-lugs adapted to fit the key slot to guide the insertion of the shell within the cap, in one position, said shell being provided with additional guideslots toreceive the saidiguide-lu gs intherespecti've posit-ions, of a tubular insuiati'ng-sleeve surrounding the base within the shellyan inturned lip on the shell to secure-the said shell adapted to marginal engagementwith the cap, said shell and cap having three points of engagement disposed equi-distant around,their circumference, detachably to secure the shell toithe cap, a single guide on the cap, said shell having guide slots arranged equi-distant and adjacent to the engaging means, two of said slots being adaptedto be covered by the cap margin and the I remaining slot having an enlargement to receive the socket key.

6; In a key socket for electric lamps, the combination. with an inclosing cap and a shell adapted to marginal engagement with the cap, engaging means on, said shell and shell having guide slots adjacent to the encap arranged equidistant around thir'circumference and adapted to cotipera-te detachably to secure the shell to the cap, said gaging means, one of said slots having an enlargement to receive the socket keyand a single guide on the cap to fit the slots in the respective assembled positions, said guide being formed by inturned portions of v the cap margin adapted to present cut metal edges to abut the shell at the sides of the slots.

Y 7 Inan incandescent electric lamp socket the; combination of theica'p and the shell provided each with a plurality and equal number of corresponding engaging parts symmetrically arranged around their mar- ",fgins and adapted to engage when the shell ls'T'inserted in the cap, said shell being provided with guide slots in its upper margin andsaid cap being formed with at least one guide to fit said slots.

8. In a key-socket for incandescent elec-.

- tric lamps, the combination with the'cap on its upper margin, one of said slots being I Copiesof this patent niay'be obtained for and the shell provided each with a plurality and equal number of corresponding engaging parts arranged at ,equal distances around their margins and adapted to engage when the shell is inserted in the cap, said shell being provided with guide slots enlarged to receive thekey shank and'said cap beingprovided with a single guide to fit said slots.

9. In a. key-socket .forincandescent electric lamps the combination ofthe cap and the shell provided ,each with a plurality and equal number of corresponding engaging I their margins and adapted'toengage when the shell-' is inserted in the cap said shell i being provided with a plurality of guide slots in its upper margin equal in number to the engaging means on the shell margin and said cap being provided with at least one guide to fit said slot.

w 10. An incandescent electric lamp key socket comprising a thin metal oap'and shell for inclosing and protecting the operative parts the cap having an annular flange and the s ell having a resilient upper 1margin, adapted to fit snugly within the cap, the.

margin having a slot fort-he outwardly parts arranged at equal distances around extending key, andthe. flange and margin being formed with engaging parts to en:

' gage and secure the shell to the cap when .the parts are assembled, and. a base composed of two substantially cylindrical blocks of insulating material forsupporting the operating parts, thetlower block fitting snugly within the shell to maintain the parts in position, but the upper block be-' ing substantially smaller than the low'erat a point adjacent to the key-s10" to permit compression of the margin at --that point, permitting disengagement of the shell from the cap.-

1 n comprising a thin metal casing for inclosing and a shell having a resilient upper margin fitting within the flange, said flange and margin being provided with corresponding elevations and depressions to engage when the parts are assembled, and a porcelain base arranged within the casing, said base consisting of tWosubsta-ntially cylindrical blocks, the lower block being of'larger diameter to fit snugly within the shell, andthe upper being'substantially smaller. in diam-' eter to project up within the cap and permit incandescent electric lamp socket and supporting the inner parts, said casing f consistlng of a cap having an annular flangecompression'of the margina'nd-disengagement of the shell from the cap.

- Jersey City NewjJersgy March 19th 1909.

f JULIUS K. LUX.

:VVitnesses: I

WM. G. MEYER, FRANK A. BYRNL.

five cents each, by addressing the Commissioner of Patents, washif igton, n. c." 

